8899779986 has 4 divisors (see below), whose sum is σ = 13349669982. Its totient is φ = 4449889992.

The previous prime is 8899779953. The next prime is 8899779991. The reversal of 8899779986 is 6899779988.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 8889661225 + 10118761 = 94285^2 + 3181^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 8899779986.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2224944995 + ... + 2224944998.

Almost surely, 2^8899779986 is an apocalyptic number.

8899779986 is a deficient number, since it is larger than the sum of its proper divisors (4449889996).

8899779986 is a wasteful number, since it uses less digits than its factorization.

8899779986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4449889995.

The product of its digits is 987614208, while the sum is 80.

The square root of 8899779986 is about 94338.6452414916. The cubic root of 8899779986 is about 2072.3340212798.

The spelling of 8899779986 in words is "eight billion, eight hundred ninety-nine million, seven hundred seventy-nine thousand, nine hundred eighty-six".